The Makita HM1317C Demolition Hammer offers high durability and excellent demolition performance. Suppression of motor speed during no load reduces vibration of the tool body. The unique Makita AVT Anti-Vibration Technology design employs the pneumatic pressure created in the drill's hammer piston chamber, to move a counter balance in the opposite direction, reducing the impact vibrations at the steel point. This dramatically reduces vibration. Supplied with: 1 x Bull Point, 1 x Side Handle and 1 x Carrying Case. Specification Input Power: 1,510W No Load Speed: 730-1,450/min. Impact Energy: 21 joules Shank Size: 30mm Weight: 17kg Vibration Chiselling: 8.5 m/sec². Vibration K Factor: 1.5 m/sec² Noise Sound Power: 101 dB(A). Noise Sound Pressure: 81 dB(A). Noise K Factor: 2.4 dB(A).